August weather forecast
Vermilion, IL

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Weather in August

August, the last month of the summer in Vermilion, is also a moderately hot month, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 81.1°F (27.3°C).

Temperature

August's arrival brings an average high-temperature of a still moderately hot 81.1°F (27.3°C), slightly deviating from July's 82.4°F (28°C). An average low-temperature of 64°F (17.8°C) is recorded in the month of August in Vermilion.

Heat index

The average heat index in August is computed to be a hot 87.8°F (31°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
When referencing the heat index, its values are suitable for shady environments and light breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

The average relative humidity in August is 82%.

Rainfall

In Vermilion, in August, it is raining for 12.4 days, with typically 1.54" (39mm) of accumulated precipitation. In Vermilion, during the entire year, the rain falls for 133.4 days and collects up to 19.49" (495mm) of precipitation.

Snowfall

In Vermilion, snow does not fall in May through October.

Daylight

In Vermilion, the average length of the day in August is 13h and 41min.
On the first day of August, sunrise is at 5:50 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:22 pm CDT.

Sunshine

The average sunshine in August is 10.1h.

UV index

The average daily maximum UV index in August in Vermilion, Illinois, is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 5 in August translates into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What are August temperatures in Vermilion?

The average high-temperature and low-temperature in Vermilion, Illinois, during August are 81.1°F (27.3°C) and 64°F (17.8°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is computed to be 87.8°F (31°C).

What is the average humidity in August in Vermilion?

The average relative humidity in August is 82%.

How much does it rain in Vermilion in August?

In Vermilion, Illinois, in August, during 12.4 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in Vermilion?

May through October are months without snowfall.

How many hours of daylight does Vermilion have in August?

In Vermilion, the average day length in August is 13h and 41min.

What time are sunrise and sunset in August in Vermilion?

On the first day of August, sunrise is at 5:50 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:22 pm CDT.

How many hours of sunshine does Vermilion have in August?

In August, the average sunshine duration in Vermilion, Illinois, is 10.1h.

How high is the UV index in August in Vermilion?

In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Vermilion, IL

Average temperature in August - Vermilion, IL
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in August: 64°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in August
Vermilion, IL

Average pressure in August - Vermilion, IL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Vermilion, IL

Average wind speed in August - Vermilion, IL
  • Average wind speed in August: 6.1mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).

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Average humidity in August
Vermilion, IL

Average humidity in August - Vermilion, IL
  • Average humidity in August: 82%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Vermilion, IL

Average rainfall in August - Vermilion, IL
  • Average rainfall in August: 1.54"

The wettest month (with the highest rainfall) is April (2.76").
The driest month (with the least rainfall) is February (0.94").

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Average rainfall days in August
Vermilion, IL

Average rainfall days in August - Vermilion, IL
  • Average rainfall days in August: 12.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (6.3 days).

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Average snowfall in August
Vermilion, IL

Average snowfall in August - Vermilion, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is December (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Vermilion, IL

Average snowfall days in August - Vermilion, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Vermilion, IL

Average daylight in August / Average sunshine in August - Vermilion, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in August
Vermilion, IL

Average sunshine days in August - Vermilion, IL
  • Average sunshine days in August: 14.9 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in August
Vermilion, IL

Average UV index in August - Vermilion, IL
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
Vermilion, IL

Average cloud cover in August - Vermilion, IL
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June, August and September (Cloud cover 31).

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Average visibility in August
Vermilion, IL

Average visibility in August - Vermilion, IL
  • Average visibility in August: 5mi

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).

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Vermilion, Illinois, USA

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